The Christ Pantokrator Complex (Zeyrek Camii, a UNESCO World Heritage Site) that included the mausoleum of the imperial dynasty, a monastery, a hospital, an orphanage, a home of the elderly and a poorhouse was founded in 1118 by Empress Piroska-Eirene and Emperor John II Komnenos. The second largest Byzantine church still standing in Istanbul after the Hagia Sophia, the Pantokrator was the most ambitious project of the Komnenian renaissance and the most impressive construction of twelfth-century Byzantine architecture. To commemorate the nine hundred years of the Pantokrator Complex, the Department of Medieval Studies at CEU Budapest and the Hungarian Hagiography Society organize, in collaboration with LABEX RESMED of Sorbonne-Paris, Ludwig-Maximilians University, Munich, and the Hungarian Institute in Istanbul an international conference that brings together scholars from diverse scholarly traditions to discuss the social, architectural and spiritual meanings of this outstanding monument.